Don't set default unit price on stock move

issue8119
review255251002

tests/scenario_purchase_shipment_cost.rst

@@ -80,8 +80,7 @@ Receive a single product line::
     >>> move.to_location = shipment.warehouse.input_location
     >>> move.product = product
     >>> move.quantity = 50
-    >>> move.unit_price
-    Decimal('8')
+    >>> move.unit_price = Decimal('8')
     >>> shipment.carrier = carrier
     >>> shipment.cost
     Decimal('3')
@@ -105,6 +104,7 @@ Receive many product lines::
     ...     move.to_location = shipment.warehouse.input_location
     ...     move.product = product
     ...     move.quantity = quantity
+    ...     move.unit_price = Decimal('8')
     >>> shipment.carrier = carrier
     >>> shipment.cost
     Decimal('3')

tests/scenario_purchase_shipment_cost_with_account_stock.rst

@@ -131,16 +131,14 @@ Receive a single product line::
     >>> move.to_location = shipment.warehouse.input_location
     >>> move.product = product
     >>> move.quantity = 30
-    >>> move.unit_price
-    Decimal('8')
+    >>> move.unit_price = Decimal('8')
     >>> move = Move()
     >>> shipment.incoming_moves.append(move)
     >>> move.from_location = supplier_location
     >>> move.to_location = shipment.warehouse.input_location
     >>> move.product = product_average
     >>> move.quantity = 20
-    >>> move.unit_price
-    Decimal('8')
+    >>> move.unit_price = Decimal('8')
     >>> shipment.carrier = carrier
     >>> shipment.cost
     Decimal('3')
@@ -178,6 +176,7 @@ Receive many product lines::
     ...     move.to_location = shipment.warehouse.input_location
     ...     move.product = product
     ...     move.quantity = quantity
+    ...     move.unit_price = Decimal('8')
     >>> shipment.carrier = carrier
     >>> shipment.cost
     Decimal('3')